/* ==================================================================
   爱思助手 帮助中心 —— 卡片网格风（不同于 faq/ 的手风琴风）
   亮色 SaaS 帮助中心：大搜索 Hero + 分类图标卡网格 + 双列问答卡
   数据引擎复用 ../faq/data.js + ../faq/gen.js
   ================================================================== */
:root {
    --tone: #007aff;
    --tone-deep: #0056d6;
    --tx0: #1d1d1f;
    --tx1: #5b6270;
    --tx2: #9aa0ab;
    --edge: #eceef2;
    --floor: #f6f8fb;
    --panel: #fff;
    --round: 16px;
    --lift1: 0 1px 2px rgba(16,24,40,.04), 0 8px 24px rgba(16,24,40,.06);
    --lift2: 0 8px 16px rgba(16,24,40,.08), 0 20px 48px rgba(16,24,40,.12);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, "Microsoft Yahei", "Helvetica Neue", Arial, sans-serif;
    font-size: 14px; color: var(--tx0); background: var(--floor);
    -webkit-font-smoothing: antialiased;
}
a { color: var(--tone); text-decoration: none; }
a:hover { color: var(--tone-deep); }
img { border: 0; max-width: 100%; display: block; }
ul, ol { list-style: none; }
code {
    font-family: Consolas, Monaco, "Courier New", monospace; font-size: 12.5px;
    background: #f0f2f5; padding: 2px 6px; border-radius: 5px; color: #c7254e; word-break: break-all;
}
.shell { width: 1180px; max-width: 100%; margin: 0 auto; padding: 0 24px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------------- 顶栏 ---------------- */
.mast {
    position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.86);
    -webkit-backdrop-filter: saturate(180%) blur(20px); backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--edge);
}
.mast-in { height: 62px; display: flex; align-items: center; }
.mast-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; color: var(--tx0); }
.mast-logo img { width: 30px; height: 30px; }
.mast-links { margin-left: auto; display: flex; gap: 26px; }
.mast-links a { color: var(--tx1); font-size: 14px; }
.mast-links a:hover, .mast-links a.now2 { color: var(--tone); }

/* ---------------- Hero + 搜索 ---------------- */
.intro {
    background: radial-gradient(1200px 400px at 50% -120px, rgba(0,122,255,.14), transparent 70%), #fff;
    border-bottom: 1px solid var(--edge); text-align: center; padding: 56px 0 48px;
}
.intro h1 { font-size: 32px; letter-spacing: -.5px; }
.intro p { color: var(--tx1); font-size: 15px; margin-top: 12px; }
.intro-num { color: var(--tx2); font-size: 13px; margin-top: 8px; }
.hunt {
    margin: 28px auto 0; max-width: 640px; display: flex; align-items: center; gap: 8px;
    background: #fff; border: 1px solid var(--edge); border-radius: 14px; padding: 6px 6px 6px 18px;
    box-shadow: var(--lift1);
}
.hunt:focus-within { border-color: var(--tone); box-shadow: 0 0 0 4px rgba(0,122,255,.12); }
.hunt svg, .hunt .hunt-ic { width: 20px; height: 20px; flex: none; color: var(--tx2); }
.hunt input { flex: 1; border: 0; outline: 0; font-size: 15px; background: transparent; height: 44px; }
.hunt button {
    border: 0; background: var(--tone); color: #fff; font-size: 14px; font-weight: 600;
    height: 44px; padding: 0 22px; border-radius: 10px; cursor: pointer;
}
.hunt button:hover { background: var(--tone-deep); }
.hunt-hot { margin-top: 14px; color: var(--tx2); font-size: 13px; }
.hunt-hot a { margin: 0 4px; color: var(--tx1); }

.hmain { padding: 40px 0 64px; }
.part-cap { font-size: 18px; font-weight: 700; margin: 0 0 18px; display: flex; align-items: baseline; gap: 10px; }
.part-cap em { font-style: normal; font-size: 13px; color: var(--tx2); font-weight: 400; }

/* ---------------- 分类图标卡网格 ---------------- */
.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 44px; }
.tile {
    background: var(--panel); border: 1px solid var(--edge); border-radius: var(--round);
    padding: 20px; display: flex; gap: 14px; align-items: flex-start; cursor: pointer;
    transition: transform .16s ease, box-shadow .16s ease, border-color .16s;
}
.tile:hover { transform: translateY(-3px); box-shadow: var(--lift2); border-color: transparent; }
.tile.now2 { border-color: var(--tone); box-shadow: 0 0 0 3px rgba(0,122,255,.12); }
.tile-ic { width: 44px; height: 44px; border-radius: 12px; flex: none; display: flex; align-items: center; justify-content: center; }
.tile-ic svg, .tile-ic img { width: 24px; height: 24px; color: #fff; display: block; }
.tile-tx b { font-size: 15px; color: var(--tx0); display: block; }
.tile-tx span { font-size: 12.5px; color: var(--tx2); display: block; margin-top: 3px; line-height: 1.5; }
.tile-tx i { font-style: normal; font-size: 12px; color: var(--tone); display: block; margin-top: 8px; font-weight: 600; }

/* ---------------- 问答卡片双列 ---------------- */
.qdeck { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.qk {
    background: var(--panel); border: 1px solid var(--edge); border-radius: var(--round);
    padding: 20px 22px; display: flex; flex-direction: column; transition: transform .16s, box-shadow .16s, border-color .16s;
}
.qk:hover { transform: translateY(-3px); box-shadow: var(--lift2); border-color: transparent; }
.qk-grp { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; align-self: flex-start; padding: 3px 10px; border-radius: 20px; margin-bottom: 12px; }
.qk-dot { width: 6px; height: 6px; border-radius: 50%; }
.qk-q { font-size: 15.5px; font-weight: 600; line-height: 1.5; color: var(--tx0); margin-bottom: 10px; }
.qk-q a { color: inherit; }
.qk-q a:hover { color: var(--tone); }
.qk-sum { font-size: 13px; color: var(--tx1); line-height: 1.7; flex: 1; overflow: hidden; }
.qk-sum strong { color: var(--tx0); }
.qk-ft { display: flex; align-items: center; gap: 14px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--edge); color: var(--tx2); font-size: 12px; }
.qk-ft .morex { margin-left: auto; color: var(--tone); font-weight: 600; }
.qk-ft .mi { display: inline-flex; align-items: center; gap: 4px; }
.qk-ft svg, .qk-ft .icx { width: 13px; height: 13px; vertical-align: -2px; }

.blankbox { text-align: center; padding: 60px 0; color: var(--tx2); font-size: 15px; }

/* ---------------- 分页 ---------------- */
.pages { display: flex; flex-wrap: shell; align-items: center; gap: 8px; justify-content: center; margin-top: 36px; }
.pages button {
    min-width: 40px; height: 40px; padding: 0 12px; border: 1px solid var(--edge); background: #fff;
    border-radius: 10px; color: var(--tx0); font-size: 13px; cursor: pointer; transition: all .15s;
}
.pages button:hover:not([disabled]):not(.sel) { border-color: var(--tone); color: var(--tone); }
.pages button.sel { background: var(--tone); border-color: var(--tone); color: #fff; font-weight: 700; cursor: default; }
.pages button[disabled] { opacity: .4; cursor: not-allowed; }
.pages .pages-dot { color: var(--tx2); }
.pages .pages-info { margin-left: 8px; font-size: 13px; color: var(--tx2); }

.btm { border-top: 1px solid var(--edge); background: #fff; padding: 26px 0; color: var(--tx2); font-size: 12.5px; line-height: 1.8; }
.btm a { color: var(--tx1); }

/* ---------------- 文章页 ---------------- */
.path { font-size: 13px; color: var(--tx2); padding: 20px 0 0; }
.path a { color: var(--tx1); }
.path span { margin: 0 8px; color: var(--tx2); }
.paper-zone { display: grid; grid-template-columns: 1fr 260px; gap: 32px; padding: 20px 0 64px; align-items: start; }
.paper { background: #fff; border: 1px solid var(--edge); border-radius: var(--round); padding: 36px 40px; box-shadow: var(--lift1); }
.paper-grp { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 20px; }
.paper-cap { font-size: 27px; line-height: 1.35; margin: 16px 0 14px; letter-spacing: -.3px; }
.paper-info { display: flex; flex-wrap: shell; gap: 16px; color: var(--tx2); font-size: 13px; padding-bottom: 20px; border-bottom: 1px solid var(--edge); }
.paper-info .mi { display: inline-flex; align-items: center; gap: 5px; }
.paper-info svg, .paper-info .icx { width: 14px; height: 14px; vertical-align: -2px; }
.paper-lead { font-size: 15px; line-height: 1.85; color: var(--tx0); background: #f6f9ff; border-left: 3px solid var(--tone); border-radius: 0 10px 10px 0; padding: 16px 20px; margin: 24px 0; }
.paper-lead strong { color: var(--tone-deep); }
.paper-bd { font-size: 15px; line-height: 1.9; color: #33383f; }
.paper-bd h2 { font-size: 19px; margin: 30px 0 12px; padding-left: 12px; border-left: 4px solid var(--tone); }
.paper-bd h3 { font-size: 16px; margin: 22px 0 10px; }
.paper-bd p { margin: 12px 0; }
.paper-bd ul, .paper-bd ol { margin: 12px 0; padding-left: 4px; }
.paper-bd li { position: relative; padding-left: 26px; margin: 9px 0; }
.paper-bd ul li::before { content: ""; position: absolute; left: 6px; top: 9px; width: 7px; height: 7px; border-radius: 50%; background: var(--tone); }
.paper-bd ol { counter-reset: n; }
.paper-bd ol li { counter-increment: n; }
.paper-bd ol li::before { content: counter(n); position: absolute; left: 0; top: 1px; width: 20px; height: 20px; background: var(--tone); color: #fff; font-size: 12px; border-radius: 50%; text-align: center; line-height: 20px; font-weight: 700; }
.paper-bd strong { color: var(--tx0); }
.snap { margin: 20px 0; border: 1px solid var(--edge); border-radius: 12px; overflow: hidden; }
.snap img { width: 100%; }
.snap figcaption { font-size: 12.5px; color: var(--tx2); padding: 10px 14px; background: #fafbfc; }
.memo { background: #fffaf0; border: 1px solid #ffe4b3; border-radius: 10px; padding: 14px 16px; margin: 16px 0; font-size: 14px; line-height: 1.8; color: #6b5320; }
.memo-warn { background: #fff2f2; border-color: #ffcdcd; color: #8a2b2b; }
.tab-box { overflow-x: auto; margin: 16px 0; }
.tab { width: 100%; border-collapse: collapse; font-size: 14px; }
.tab th, .tab td { border: 1px solid var(--edge); padding: 10px 12px; text-align: left; }
.tab th { background: #f6f8fb; font-weight: 600; }
.noverify { color: #c77700; background: #fff4e0; padding: 0 5px; border-radius: 4px; font-size: 12px; }
.srcs { margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--edge); }
.srcs h2 { font-size: 16px; margin-bottom: 10px; }
.srcs ol li { counter-increment: s; position: relative; padding-left: 24px; margin: 7px 0; font-size: 13px; color: var(--tx1); }
.srcs ol { counter-reset: s; }
.srcs ol li::before { content: counter(s); position: absolute; left: 0; top: 0; color: var(--tx2); font-weight: 700; }
.nearby { margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--edge); }
.nearby h2 { font-size: 16px; margin-bottom: 12px; }
.nearby-pool { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.nearby-pool a { border: 1px solid var(--edge); border-radius: 10px; padding: 12px 14px; font-size: 13.5px; color: var(--tx0); line-height: 1.5; transition: all .15s; }
.nearby-pool a:hover { border-color: var(--tone); color: var(--tone); background: #f6f9ff; }
.pnv { display: flex; gap: 12px; margin-top: 24px; }
.pnv a { flex: 1; border: 1px solid var(--edge); border-radius: 10px; padding: 12px 16px; font-size: 13px; color: var(--tx1); transition: all .15s; }
.pnv a:hover { border-color: var(--tone); color: var(--tone); }
.pnv a.next { text-align: right; }
.dir { position: sticky; top: 82px; background: #fff; border: 1px solid var(--edge); border-radius: 14px; padding: 18px; }
.dir-cap { font-size: 13px; font-weight: 700; color: var(--tx1); margin-bottom: 10px; }
.dir a { display: block; font-size: 13px; color: var(--tx2); padding: 6px 0 6px 12px; border-left: 2px solid var(--edge); line-height: 1.4; }
.dir a:hover, .dir a.here { color: var(--tone); border-left-color: var(--tone); }
.bklist { display: inline-block; margin-top: 24px; color: var(--tx1); font-size: 13px; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 980px) {
    .tiles { grid-template-columns: repeat(2, 1fr); }
    .qdeck { grid-template-columns: 1fr; }
    .paper-zone { grid-template-columns: 1fr; }
    .dir { display: none; }
}
@media (max-width: 560px) {
    .shell { padding: 0 16px; }
    .tiles { grid-template-columns: 1fr; }
    .intro h1 { font-size: 25px; }
    .hunt button { padding: 0 14px; }
    .paper { padding: 24px 20px; }
    .paper-cap { font-size: 22px; }
    .nearby-pool { grid-template-columns: 1fr; }
    .mast-links { gap: 16px; }
    .pages .pages-info { width: 100%; text-align: center; margin: 6px 0 0; }
}